Ginga observations of Hercules X-1: Spectrum dependence on 35 day phase

Her X-1 was observed with good coverage and good sensitivity over a wide ra nge of 35 day phase with the Ginga LAC in 1988 and 1989. Although several s mall sections have been previously studied, the spectra from this full set of observations have not been analyzed previously. Main high, short high, a nd low state spectra all require a two component continuum (absorbed and un absorbed). Dips and eclipses were identified and the behavior of spectral p arameters outside these events is studied. Excluding dips/eclipses, the iro n line energy is similar or equal to6.60 keV (whereas during dips/eclipses, it drops to similar or equal to6.4 keV); the column density of the absorbe d component is N-H similar or equal to 10(24.0)cm(-2); and the power-law in dex is alpha similar or equal to 0.95. The iron line intensity is well corr elated with the total continuum intensity, indicating that reprocessing is important at all times and that a major source of the iron line is the accr etion column during main high. The iron line equivalent width (EW) varies b etween main high, short high, and low states, with mean values for each sta te of 0.48 keV, 0.66 keV, and similar or equal to1.37 keV, respectively. Th e ratio of absorbed continuum to unabsorbed continuum, R, also varies with 35 day phase, and EW is correlated with R. The behaviors of absorbed and un absorbed continuum normalizations, EW and R are consistent with the accreti on-column inner-disk model of Scott, Leahy, & Wilson.